Shureflo pump pulsing

[Griff097]

Anyone else got a Rollerteam with a Shurflo pump?

Just picked up a new to us 2018 685 and when you open a tap slowly the water pulses and the pump is making a loud pulsing noise which carries on for a few seconds after closing the tap.

Are they all like this or do I maybe need to fit an accumulator etc

I have searched the forum but can't find quite the same description of fault.

 

[Podney]

Thought they all did that...ours does. If the pump is too noisy it may be because of the way it’s fitted e.g.vibrating in confined space or lack of insulation.

 

[Robert Clark]

On our pump, on the end of the pump there is a tiny Alan key adjustment. It’s part of the pressure switch and you’ll see wires coming out of the switch.
Adjusting the screw whilst the tap is running will stop the pulsating

 

[Griff097]

On our pump, on the end of the pump there is a tiny Alan key adjustment. It’s part of the pressure switch and you’ll see wires coming out of the switch.
Adjusting the screw whilst the tap is running will stop the pulsating

Thanks guys I will have a look when we get back.

I was saying to Quackers last night how friendly and helpful this forum is.

 

[Richard n Ann]

Still got our setup instructions

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[Raul]

Our pump runs few seconds after closing the tap. We have a small fiamma expansion vessel after the pump to eliminate pulsing. Also when you open the tap, it delays the start, depending on water usage. The expansion vessel holds 1L of water so if you take less, the pump will not start until vessel empties.

 

[icantremember]

Put one of these in the line after the pump ...

The blue thing NOT the red!
Fiamma A20 Expansion Tank will cure your problem.

 

[Griff097]

Put one of these in the line after the pump ...
View attachment 502698
The blue thing NOT the red!
Fiamma A20 Expansion Tank will cure your problem.

Does the lady in red come to fit it?

 

[icantremember]

Does the lady in red come to fit it?

If only!

 

[Griff097]

I can't seem to find a location for an Allen key, the pumps not that accessible tbh

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[Lenny HB]

I can't seem to find a location for an Allen key, the pumps not that accessible tbh

On that pump it will be a Philips screw on the end of the black plastic section.

 

[Griff097]

On that pump it will be a Philips screw on the end of the black plastic section.

I will try again tomorrow, struggling with a trapped nerve and unless I can get the table out its nigh on inaccessible for me at 6'5 and the gap between the bottom of the pump and the pipe is pretty slim.

 

[gus-lopez]

Try using a mirror to see the screw. What I would suggest though is in yor OP you stated when tap is opened slowly. Yes it will pulse. If not fully open it will continally pulse as it can build up pressure faster than it is being let out of a partially opened tap.

 

[Griff097]

Try using a mirror to see the screw. What I would suggest though is in yor OP you stated when tap is opened slowly. Yes it will pulse. If not fully open it will continally pulse as it can build up pressure faster than it is being let out of a partially opened tap.

Pulses heavily at all flow rates not just pulsing but banging.

 

[PeterE1947]

I have had various water pumps including Shurflo and the only one that did not pulse was a submersible in a 1995 Swift Kon-Tiki. I have tried the "adjustment" with no difference to the pulsing. If you read all the instructions for setting it there is a bit that mentions any pipework or device that reduces the flow will make the pump pulse. Incidently, the pump pictured is not quite verticle, I wonder if that is a replacement?

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[Fat Albert]

If it's banging I would suggest looking at the anti vibration rubber mounting bushes between the pump and the attachment bracket. My pump was attached so there was no movement between the pump and bracket. All the pump vibrations were going straight through the van, like living in a loud speaker, amplified by the van structure. I inserted a piece of EPDM rubber sheet between the attachment bracket and the van. It has help but still get the pulsing but the banging is very much reduced that I don't consider it a problem.

 

[Beemobile]

Mine vibrates if the tap isn't open fully .

 

[Campervan_man]

If you fit an inline 12MM one way valve in the water line near your "fresh water tank outlet" it stops water running back to the water tank when the pump is OFF.
That stops air pockets being formed in the cold water pipe.

 

[Pickygame]

On that pump it will be a Philips screw on the end of the black plastic section.

Check the filter is full of water while it's running. You may have a crack in the body. I was getting continual running when shut off. I back flowed the pump and it cleared a small piece of debris in the feedpipe

 

[Ingwe]

Put one of these in the line after the pump ...
View attachment 502698
The blue thing NOT the red!
Fiamma A20 Expansion Tank will cure your problem.

What blue thing?

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[tonyidle]

If you fit an inline 12MM one way valve in the water line near your "fresh water tank outlet" it stops water running back to the water tank when the pump is OFF.
That stops air pockets being formed in the cold water pipe.

Two of those are built into the pump. You only need one for an in-tank pump.

 

[Swifter]

What blue thing?

The blue expansion tank

 

[icantremember]

The blue expansion tank

I think Ingwe is cross eyed and focused on the red things.

 

[Griff097]

If it's banging I would suggest looking at the anti vibration rubber mounting bushes between the pump and the attachment bracket. My pump was attached so there was no movement between the pump and bracket. All the pump vibrations were going straight through the van, like living in a loud speaker, amplified by the van structure. I inserted a piece of EPDM rubber sheet between the attachment bracket and the van. It has help but still get the pulsing but the banging is very much reduced that I don't consider it a problem.

Thanks very much to Fat Albert for sending me some rubber to put behind the pump mountings for free, a generous soul indeed, it has made a little difference and no amount of adjusting the screw on the pump made any difference unfortunately.
There is a loose pipe or flexi in the bathroom that is bouncing off the side of the van with the pulsing just to exacerbate the problem.
Next step will be an accumulator, when I have 5 mins.

 

[Scully]

Thanks very much to Fat Albert for sending me some rubber to put behind the pump mountings for free, a generous soul indeed, it has made a little difference and no amount of adjusting the screw on the pump made any difference unfortunately.
There is a loose pipe or flexi in the bathroom that is bouncing off the side of the van with the pulsing just to exacerbate the problem.
Next step will be an accumulator, when I have 5 mins.

If you can get access to that pipe in the bathroom, put some cheap foam pipe insulation around it.

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[wp1234]

Ive found that changing the shower head to a more free flowing head really did make for a quieter system.